How to get wider view on orthographic camera?
When using an orthographic camera the distance to the camera does not have any effect on the view.
Use Orthographic Scale to change the view instead.

The {Blender Manual](https://docs.blender.org/manual/en/dev/render/cycles/camera.html) illustrates the difference between perspective and orthographic cameras:

Perspective:
Focal Length/Field of View Control the field of view set by lens property or by angle as selected in the Lens Unit menu.



Orthographic Scale
Controls the size of objects projected on the image.


More info in this link:
What are the differences between Orthographic and Perspective views?